Vacuum cleaner



FIG. 1 is a right side elevational view of a vacuum cleaner showing our new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is lef side elevational view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a front elevational view thereof;

FIG. 6 is a rear elevational view thereof; and,

FIG. 7 is front perspective view thereof.

The details shown in broken lines in FIGS. 5-7 are shown for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a vacuum cleaner, as shown. 